Aircraft Measurements of Aerosol Physical, Chemical and Optical Properties During ACE-1

这个项目是南半球海洋气溶胶表征实验（ACE-1）的一部分，该实验将于1995年在遥远的南太平洋进行，使用飞机、船上和地面对各种化学物质、物理和气象参数进行测量，其中心目标是调查大气气溶胶的形成、演化和光学特性。在这个组件中，C-130飞机上将部署各种仪器来测量气溶胶特性：热条件光学粒子计数器将用于评估较大的光学活性气溶胶的大小分解成分，各种凝结核计数器，超细凝结核计数器，以及用于确定凝结核大小谱的差分迁移率分析仪，用于气溶胶散射系数的浊度计，以及用于气溶胶吸收系数的空气粘度计。这项工作的目的是表征所研究区域的气溶胶辐射特性，并开发可能导致对远程气溶胶及其辐射特性的预测性理解和建模的工具。将处理以下具体目标：建立可用于模拟气溶胶光学特性、辐射强迫和卫星衍生辐射的气溶胶微物理、化学和光学参数之间的联系。研究细颗粒（例如硫酸盐）和粗颗粒（例如海盐）以及相对湿度对局部和柱状气溶胶散射消光的贡献。对拉格朗日平流期间形成海洋边界层气溶胶演化过程的定量理解。查明对流层中最近在原位和/或地表产生的气溶胶（海盐、灰尘、烟灰）中存在的颗粒，并检查相关气团与环境过程和来源的关系。与ACE-1的其他参与者合作，将全球、区域和本地尺度的气溶胶数据、激光雷达数据、气体前体等联系起来，以确定远程海洋气溶胶动态模型的关键参数和过程。

9419475 Clarke This project is part of the Southern Hemisphere Marine Aerosol Characterization Experiment (ACE-1), which will be conducted in the remote Southern Pacific in 1995 using aircraft, ship-board, and ground-based measurements of a wide variety of chemical species, physical and meteorological parameters with the central goal of investigating the formation, evolution, and optical properties of atmospheric aerosol. In this component, a variety of instruments will be deployed on the C-130 aircraft to measure aerosol properties: thermally conditioned optical particle counters will be used to assess size resolved composition of the larger optically active aerosol, various condensation nuclei counters, ultrafine condensation nuclei counters, and a differential mobility analyzer to determine the condensation nuclei size spectrum, nephelometers for the aerosol scattering coefficient, and an aethaelometer for the aerosol absorption coefficient. The objective of this work is to characterize aerosol radiative properties in the region studied, and also to develop tools that may lead to a predictive understanding and modeling of the remote aerosol and its radiative properties. The following specific objectives will be addressed: Establish a link between aerosol microphysical, chemical and optical parameters that can be used to model aerosol optical properties, radiative forcing and satellite derived radiance. Examine the contribution of fine particles (e.g. sulfate) and coarse particles (e.g. sea salt) and relative humidity to the local and column aerosol scattering extinction. Develop a quantitative understanding of the processes shaping evolution of the aerosol in the marine boundary layer during Lagrangian advection. Identify the presence of particles recently formed in situ and/or surface derived aerosol (sea salt, dust, soot) in the mid-troposphere and examine the relationship of associated air masses to environmental processes and sources. Work with other ACE-1 participants towa rd linking aerosol data, lidar data, gaseous precursors, etc. on global, regional and local scales to identify key parameters and processes for a dynamic model of remote marine aerosol.